Listen Technologies LAS-04-DB-A1 – Auri ADA Compliance System 4, Dante/Black
Listen Technologies LAS-04-DB-A1 – Auri ADA Compliance System 4, Dante/Black is backordered and will ship as soon as it is back in stock.
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Product Overview
The Listen Technologies LAS-04-DB-A1 is a complete Auri assistive listening system for assembly areas seating up to 100, supplied with a two-channel Auracast transmitter, a 4-unit docking station, 4 receivers and the wearable accessories a venue needs on day one. Auracast broadcast audio removes the pairing step that made earlier Bluetooth assistive listening impractical in public venues, and places no ceiling on how many compatible devices can receive the broadcast at once. The Dante variant takes its audio over the network rather than an analogue feed.
Product Description
ADA assistive listening obligations are usually met by counting receivers against seats. That is what a packaged system is for: the LAS-04-DB-A1 covers an assembly area of up to 100 seats in one order code, so the specification does not have to be assembled line by line from a components catalogue.

Auracast changes the economics underneath that obligation. Because it is a broadcast rather than a paired connection, an unlimited number of compatible devices can receive the same stream, so patrons carrying Auracast-capable phones or hearing aids need no hardware from the venue at all. The 4 AURI-RX1 receivers in this kit exist for the patrons who do not, which is what most accessibility obligations still require a venue to provide.
The transmitter carries two independent channels, which covers audio description alongside the floor language, or a second language, without a second system. End-to-end latency is under 40 ms, low enough that a listener watching the stage does not perceive the audio as detached from the speaker's lips.
Receivers charge and store in the included Auri Docking Station 4, which also handles firmware distribution across the fleet. Two earphone and neck loop lanyards are supplied for telecoil hearing aid wearers and 4 universal stereo headphones for everyone else.
Order Auri signage alongside the system. Signage is a compliance requirement in its own right, not an accessory: a venue that installs assistive listening without indicating that it is available has not discharged the obligation. Transmitters ship without a power supply and run from PoE or USB-C, so add the USB-C charger where PoE is not available at the mounting position.
What is in the box
| 1 × AURI-TX2N-DB-A0 | Auri 2-Channel Transmitter (Dante/Black) |
|---|---|
| 1 × AURI-D4-01 | Auri Docking Station 4 |
| 4 × AURI-RX1 | Auri Receiver |
| 2 × LA-470 | Auri Earphone and Neck Loop Lanyard |
| 4 × LA-402 | Universal Stereo Headphones |
Key Features
- Covers up to 100 seats — Packaged against the seat count an ADA assistive listening specification is written from.
- Auracast broadcast audio — Unlimited compatible devices receive the same broadcast with no pairing step.
- Two independent channels — Carries audio description or a second language without a second system.
- Under 40 ms latency — Low enough that audio stays aligned with what the listener is watching.
- 4 receivers included — Provides for patrons who do not carry an Auracast-capable device of their own.
- 4-unit docking station — Charges, stores and updates the receiver fleet from one position.
- Telecoil and headphone coupling — Two neck loop lanyards and 4 stereo headphones supplied with the system.
- Black finish — Transmitter finish specified to suit the mounting position and room.
- Dante audio — Takes its programme feed from the network rather than an analogue input.
Typical Applications
- Theatres, auditoriums and performing arts venues meeting ADA assistive listening requirements
- Houses of worship serving congregations with hearing aid and cochlear implant users
- Lecture theatres, training rooms and conference facilities
- Courtrooms and civic chambers where an accessibility obligation applies
- Cinemas and screening rooms requiring audio description alongside the soundtrack
- Corporate town hall and all-hands spaces
Technical Specifications
System
| Audio Channels | Two independent channels |
|---|---|
| Broadcast Standard | Auracast Broadcast Audio (Bluetooth LE Audio) |
| Codec | LC3 |
| Sample Rates | 16 kHz, 24 kHz and 48 kHz |
| End-to-End Latency | Less than 40 ms |
| Network | RJ45, encrypted communication with authentication |
| Management | Centralised firmware update and fleet management |
| Concurrent Listeners | Unlimited compatible receiving devices |
Receiver
| Wireless | Bluetooth version 5.3, 2400 to 2482 MHz |
|---|---|
| Broadcast Mode | Auracast Compliant, Broadcast Receive Only |
| Codec | LC3 |
| Encryption | AES128-CCM |
| Audio Outputs | 2x 3.5mm TRRS for wired headphones or inductive neck loops |
| Output Power | 16mW maximum at 32Ω |
| Frequency Response | ±3 dB; 50 Hz–7.5 kHz at 16 kHz sample rate, up to 19.5 kHz at 48 kHz |
| THD+N (system) | < 0.5% |
| Signal to Noise Ratio (system) | > 60 dB |
| Latency | 29 ms to 45 ms |
| Battery | Lithium Polymer, rechargeable, field replaceable, 3.7 Vdc 730 mAh |
| Battery Life | > 20 hours |
| Charge Time | < 4 hours via USB-C PD compliant supply or docking station |
| Display | 31 x 16 mm, 64 x 128 pixel OLED, automatic brightness |
| Controls | Power, Volume Up/Down, two front multifunction soft buttons, RGB status LED |
| Dimensions | 90 x 54 x 23 mm with belt clip |
| Weight | 0.07 kg |
| Ingress Protection | IP40 |
| Operating Temperature | -10 °C to 40 °C |
| Compliance | CE, UKCA, RCM, REACH, WEEE |
Specifications sourced from the Listen Technologies Auri product listings and the Auri RX1 receiver datasheet (UP3B601-1).
Frequently Asked Questions
How many seats does the LAS-04-DB-A1 cover?
It is specified for assembly areas seating up to 100. ADA receiver-count requirements scale with seating capacity, so confirm the seat count for the room before ordering and step up to the larger system where the count sits near the boundary.
Do patrons need a receiver from the venue?
Not if they carry an Auracast-compatible phone or hearing aid, since the broadcast places no limit on how many devices receive it. The included receivers cover patrons who do not, which accessibility obligations generally require the venue to provide regardless of what patrons bring.
What audio source does the transmitter take?
Dante over the network on this variant.
How is the system powered?
The transmitter takes PoE or USB-C and ships without a power supply. Where PoE is not present at the mounting position, order the LA-425-09 USB-C charger separately. The docking station is mains powered.
How are receivers maintained over a deployment?
The docking station charges and stores the fleet and distributes firmware centrally. Receiver batteries are field replaceable and stocked separately, so a unit whose cell has degraded is repaired rather than replaced.
Does this satisfy an ADA assistive listening requirement on its own?
The hardware side, for a room of the stated capacity. Signage indicating that assistive listening is available is a separate requirement and is ordered separately, and receiver counts should be confirmed against the seating capacity and the authority having jurisdiction.
Can two of these systems run in the same building?
Yes. Auracast broadcasts are individually identified, so adjacent rooms can run their own systems. Plan the transmitter positions and network with your Listen representative where coverage areas overlap.
At Creartion Networks, we do everything we can to create an excellent customer experience. This includes fast shipping and easy returns.
- Most in-stock orders placed Monday-Friday ship within 24-48 hours. General restrictions apply; please see our full shipping policy here.
- We offer a 30-day return policy from the delivery date on many products. Product restrictions apply. Restocking fees for the return of open-box items. Please see our full return policy here for more information.
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